import java.util.Scanner;

public class Main {

    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        float input = sc.nextFloat();
        float min = input;
        float max = input;
        float sum = 0;
        int i;

        if(input<=0)
        {
            System.out.printf("enter numbers:\nno number entered.");
        }
        else
        {

            for(i=1; input>0; i++)
            {
                sum = sum + input;
                if(input> max)
                {
                    max = input;
                }
                else if (input < min)
                {
                    min = input;
                }

                input = sc.nextFloat();
            }
            float mean = sum/(i-1);
            System.out.printf("enter numbers:\nnumbers entered: %d\nminimum: %.2f\nmaximum: %.2f\nmean:    %.2f", i-1, min, max, mean);
        }


        sc.close();
    }
}